Jack



M. DWORK Apri125, 1933.

JACK

Filed Feb. 27, 1930 INVENTOR 127a,! fiwarh ATTORNEY WITNESSES PatentedApr. 25, 1933 .MAx nwonK, "or nRooKLjzn, Yo KQ jj "J K- f Application filed February 27, 1930. Serial No. 431,575. I

-My invention relates to lifting jacks and an object of the same/is toprovide a lifting jack which may beengaged with any projecting' partofan automobile such as the 5 chassis side bar and thereby obviates thenecessity of kneeling beneath the automobile to place the jack beneaththe spring or axle.

Another object of the invention is to provide a jack standard extensionwhich may be removably mounted on the lifting standard of anyconventional jack.

Still another object of the invention is to provide a verticallyadjustable jack stand,- ard extension having a lifting element for 5engagement with one of the shackle bolts and which may be mounted on theextension at any selected height so that the device can be utilized onany automobile regardless of the height of the chassis frame withrelation to the ground.

lVith the preceding and other objects and advantages in mind, theinvention consists in the novel combination of elements, constructionsand arrangements of parts and 5 operations to be hereinafter more fullydescribed, claimed and illustrated in the accompanying drawing, wherein:

Figure 1 is a front elevation of the invention' Fig. 2 is a view partlyin side elevation and partly in vertical section;

Fig. 3 is a horizontal section taken on line 33 of 2;

Fig. 1 is an elevation of the device in operative position;

Fig. 5 is a perspective of the lifting element embodied in theinvention;

Fig. 6 is a view partly in section and partly in elevation of amodification of the invention; and

Fig. 7 is a perspective of the lifting element embodied'in theconstruction disclosed in Fig. 6.

Referring to the invention in'detail a conventional jack 5 whose liftingstandard 6 is formed with a rectangular head or plate 7 is provided.

A jack standard extension is provided for cooperation with the liftingstandard 6 comprising a vertically extending bar 8 having or othersuitable fastening 14 is engaged with l ng l ment is to belocated e ow'e g perend of the bar. .8. Y f

a longitudinal groove 9 in its inner face-and Ywhichextends the entirelength of the bar.

7 -A vertically adjustable shank 104fis in the groovei) and is formedwith bevell'ed-ribs 10 on one pair of its opposite faces andwhich areslidably fitted in \I-shaped grooves 11 inthe parallel walls of the,groove 9.

I, .Forthe purpose of holding the shank 10 at predetermined points ofadjustment this shank and the bar 8 are provided with lon- 16 9gitudinally 'alinedi registering transverse openings 12 andl3; hen theshank 10. has been raised .to a predeterlnined height alscrew theregistering openings 12 andl3. .5

v a 5A; lifting element is provided consisting .of cross :sectmnallyrectangular shank 1; 15

formed with a depending ear 16. A'forwardly extending hook element 17 isformedwith one side of the ear 16 :whichhookelement is adapted. toengage beneath the upper shackle bolt ofzthe automobile as shown in Fig;{i .As illustrated in Fig. ,5, the upper face of the h ook element 17 isrecessed asindicated at 18. Normally received in the recess is. an orna-1'4"? Inental'plate 19, one :endof which is secured to the hook elementbya suitable fasteningQO. The ornamental plate19 is for the purpose ofadding to the appearancev of the device when it is on sale in that iteooperateswith the other 9 parts of the lifting element in givingthe'latter theappearanceof anelephants head. 1 In usethe shank-15 isreceived in any one of a plurality, [of rectangular transverse openings21 with thehook element projecting forward- 3 ly from the shank 1Q. Asetof rectangular transverse openings 22 are formed in. the .bar 8 forthe reception of the shank 15 ,whenzthe v w. -99 f I preventing the load.from accidentally slipping from the lifting element a' flexible element23 is carried by the ear116 and is adapted to be passed, around theshacklebolt as disclosedinFig. 4. The, free end of thislfiexible elementcarries a fastening 23 adapted to be .re'ceivedin an opening 24%. in theear 16.: In order toholdfthelifting element against. accidentalvlongitudinal movement, the rear end of. the shank 15 is 1 While a rearflange 29 depends from .therear. edge of the plate 27. Two oppositeedges of the lifting head 7 are held between the flange 29 and aU-shaped fastening 30 which as shown in Figs. 1 and 2 extends throughopen ings 31 in the plate 2Z-and; projects below the lifting head 7. TheU-shaped fastening 30 is carried on a chain 32 which has one endanchored to'an eye 33 attached to the lowerend of the shank 10Oppositely extending set screws 34; are thre'adedly engaged with-theflanges 28 and engage opposite sides ofthe standard 6. It will be thusseen that the set screws 34, removablefasten ing 30 and flange 29cooperate to rigidljr and removably' hold the jack extension onthelifti'ng standard of the jack. I p

Dirt or other foreign matter may lodge between the shank 10 and walls ofthe'groove 9 and prevent free movementof the shank.

To overcome thiscondition an expansible coil holes of said other set.

movement in two directions, and a removable fastening passing throughthe plate and contacting the side of said jack standard opposite saidother flange and serving therewith to hold the plate against movement intwo other directions.

v 2,2, vA -lifting jack extension comprising telescopicallyarrangedmembers having two sets of cross sectionally dissimilar holes,means of a cross section to suit one of the sets, being insertible in apair of holes of said one set thus securing the members and holding allholes of the other set in registration, and aliftingelement cooperatingwith said jack extension, said element having a shank .of .acrosssectionsuiting the other set of holes; said shank fitting aselected pair of MAX DWORK.

spring 35 is interposedbetween the lower end of the shank 10- and theupper face of the plate 27 It will be seen that upon tapping upon theupper end of the shank 10 the spring '35 will becompressedwhereupon it Ei will expand and jar theshank 10 and free the same.v In themodification disclosed in Figs. 6 and 7 the shank 15' isomi'tted'andlieu thereof-the lifting element is formed with a rectangular socket 36which snugly fits upoh the upper end of the shank 10 r In the operationof both f rrn's of the in vention the device is placed in alinemeht withthe rear end orpn'e of the chassis side bars and the hook elementengaged beneath the p 7 'upper'end spring shackle bolt as shown in Flg.4. The jack '5 is" then'kiperat'ed in the adapted to be engaged withupper shackle bolt as above stated; itma'y be eh'gaged with my suitableprojecting part of the automobile. p I'c'l'aimi v i 1. A lifting jackextension comprising a vertically extending emberpi'ovid'edwith alifting element, a'plate usual manner to lift one side'of the automoa 5'bile. While the lifting element ijs p'rejierahl'y dby the'lower I aid ofthe 'va fiicanyextend'iiig member aga agd' toife stlll'pbll aja'kattend, parallel flanges, depending. from the plate, third flan d an-d l'bin he the I a i h t'o thefirst mentioned flanges cent'acting one sideofsaiii'lqack standard, p

.pbsiitay extending,threadedeleiiientse rea we. paianei flanges and'agageatit with as jack"standard'tdhhlhth as against

